How can I write a script that uses the W3C DOM or IE 4 DOM depending on its availability?

If you wish to write a script that can flexibly use W3C DOM or IE 4 DOM depending on its availability, then you can use a functional testing method that first checks Is there a method or property to determine if the browser has the functionality you want.

Here is the code snippet that displays the same -

if (document.getElementById) {
   // If the W3C method exists, use it
}

else if (document.all) {
   // If the all[] array exists, use it
}

else {
   // Otherwise use the legacy DOM
}

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